Cell: Structure and Functions
Obtain the binding energy (in MeV) of a nitrogen nucleus ( 714N).
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The masses of neutron and proton are 1.0087 a.m.u. and 1.0073 a.m.u. respectively. If the neutrons and protons combine to form a helium nucleus (alpha particles) of mass 4.0015 a.m.u. The binding energy of the helium nucleus will be (1 a.m.u.= 931MeV)
Atomic weight of boron is 10.81 and it has two isotopes 5B10 and5B11. Then ratio of 5B10:5B11 in nature would be
Consider α particles, β particles and γ - rays, each having an energy of 0.5 MeV. In increasing order of penetrating powers, the radiations are:
The activity of a radioactive sample is A1 at time t1 and A2 at timet2. If τ is average life of sample then the number of nuclei decayed in time (t2−t1) is
Calculate binding energy of 92U238. Given M(U238)=238.050783amumn=1.008665amu and mp=1.007825amu
Nuclear fission was discovered by
200 MeV of energy may be obtained per fission of U235. A reactor is generating 1000 kW of power. The rate of nuclear fission in the reactor is
The binding energy per nucleon of .37Li and .24He nuclei are 5.60 MeV and 7.06 MeV, respectively. In the nuclear reaction .37Li+.11H→.24He+.24He+Q, the value of energy Q released is